Lost and Found Family

JongSuk grew up in an orphanage,believing he had no family, when he ages out of the orphanage when he's nineteen, he ends up in Gagnam where unknown to him ,his mother has been searching for him.

Soonyoung always believed her child had died was soon as he was born, but when she finds out he's alive she's determined to find him, who is the mysterious boy that she keeps running into and why is she drawn to him.